1H-Indole-2-carboxylic acid, 5,6-dihydroxy- 4790-08-3 5,6-Dhica 5,6-Dihydroxy-1H-indole-2-carboxylic acid 5,6-Dihydroxy-2-indolecarboxylic acid 5,6-dihydroxy-2-indolylcarboxylic acid DHI2C